Swing seat base



FIG. 1 is a perspective view of a swing seat base in accordance with a first embodiment of our new design;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a rear view of FIG. 1;

FIG. 4 is a left side view of FIG. 1;

FIG. 5 is a right side view of FIG. 1;

FIG. 6 is a top view of FIG. 1;

FIG. 7 is a bottom view of FIG. 1;

FIG. 8 is a perspective view showing the swing seat base shown in FIG. 1 in use;

FIG. 9 is a perspective view of a swing seat base in accordance with a second embodiment of our new design;

FIG. 10 is a front view of FIG. 9:

FIG. 11 is a rear view of FIG. 9;

FIG. 12 is a left side view of FIG. 9

FIG. 13 is a right side view of FIG. 9;

FIG. 14 is a top view of FIG. 9;

FIG. 15 is a bottom view of FIG. 9; and,

FIG. 16 is a perspective view showing the swing seat base shown in FIG. 9 in use.

The broken lines shown in the drawing are for the purpose of illustrating environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a swing seat base, as shown and described. 